package com.wl4837;

// DVD播放器
public class DvdPlayer {
    public void on() {
        System.out.println("DVD播放器打开");
    }

    public void off() {
        System.out.println("DVD播放器关闭");
    }

    public void play(String movie) {
        System.out.println("DVD播放器开始播放《" + movie + "》");
    }
}